atomic clock / radio-receiver chip

Philippe Guillebert phyce at
Sun Jun 1 23:04:14 CEST 2008

cdr wrote:
> the atomic clock(s) arent orbiting the earth,


According to wikipedia ( ), every GPS 
satellite carries an atomic clock, providing every receiver on earth 
with really precise clock. The radio clock systems you describe are 
different and kinda useless when you have GPS onboard.

As an engineer I'm stunned by the level of performance achieved of the 
GPS system : the description of Einstein's relativity compensation on 
the WP article is really scary :)


More information about the community mailing list